KROICS, Kaspars. UNIDIRECTIONAL BRAKING ENERGY RECOVERY SYSTEM FOR ELEVATORS. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 3, p. 124–128, 2019. DOI: 10.17770/etr2019vol3.4173. Disponível em: https://journals.rta.lv/index.php/ETR/article/view/4173.. Acesso em: 5 may. 2024.